Well I think your common usage definitions are wrong.
Atheist I've already defined above.
I think the common usage of agnostic means: "One who believes/thinks it is impossible to know that (a) God exists"
In that case I think you would not be classified as agnostic because you clearly believe and think God exists. I think it's therefore logical to assume that you think it
is possible to know God exists.
I would classify the hypothetical person as an agnostic theist.
Then there's those like me. So far, yes I do outright deny the existance of any specific God concepts that I've learnt about, however I don't think that from that I can follow on and say I therefore outright deny all possible God concepts.
In my opinion it's rather silly to outright deny the possibility of something like this, given that we are on such a small planet in a bloody huge universe - we know so little. I can't say there is no possibility of God existing just as I equally can't say there's no possibility of a Tellytubby planet out there.
Having said that - in the course of human history I think that any God concepts that have come about, have been human made - that at least is the conclusion I've come to based on the evidence in front of me.
So unless a God concept is placed in front of me that changes my mind (or unless God appears in front of me) then I will continue to lack belief, which I think still places me under the heading of atheist.
[hr]
http://www.greebo.org.uk - Loadsa drunken photos and suchlikes.